We look at the division of 603160 by 80 
The aim is to understand the frequency of 80 in 603160.

Going ahead to step 1:
80 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (0) from the dividend to 6 and continue with: 60 / 80

Let's proceed to step 2:
60 divided by 80 is 0 with a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 60 leaves us with 60.
Include the next digit (3) from the dividend after 60, then repeat: 603 / 80

On to step 3:
If we divide 603 by 80, we get 7 and a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 7.0
The remainder is 43 after subtracting 560 from 603.
Fetch the next digit (1) from the dividend, attach it to 43 and continue: 431 / 80

On to step 4:
The number 80 fits into 431 5 times, leaving a remainder of 31.
The number 5 becomes the next digit in our result. 
Result so far: 75.0
Subtract 400 from 431 to get 31.
Include the next digit (6) from the dividend after 31, then repeat: 316 / 80

Moving on to step 5:
When dividing 316 by 80, we get 3 with a remainder of 76.
Put 3 as the next digit of the answer. 
Result so far: 753.0
Subtracting 240 from 316 leaves us with 76.
Include the next digit (0) from the dividend after 76, then repeat: 760 / 80

Moving on to step 6:
The number 80 fits into 760 9 times, leaving a remainder of 40.
The next digit of our result is 9. 
Result so far: 7539.0
Deduct 720 from 760 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 7:
80 can be fit into 400 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 7539.5
If we take 400 away from 400, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
0 divided by 80 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 7539.5
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
80 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 7539.5
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 7539.5 and a remainder of 0.0.